package com.atguigu.three;

import com.atguigu.util.RabbitMqUtils;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.DeliverCallback;

/**
 * @author gan
 * @create 2021-07-03 16:58
 */
public class Work04 {
    //队列名称
    private static final String ACK_QUEUE_NAME = "ack_queue";

    public static void main(String[] args) throws Exception {
        Channel channel = RabbitMqUtils.getChannel();

        System.out.println("c2等待接收消息处理时间较长");

        //消息消费的时候如何处理消息
        DeliverCallback deliverCallback = (consumerTag, deliver) -> {
            String message = new String(deliver.getBody());
            SleepUtils.sleep(10);
            System.out.println("接收到消息："+message);
            /**
             * 1、消息标记tag
             * 2、是否批量应答未应答消息
             */
            channel.basicAck(deliver.getEnvelope().getDeliveryTag(), false);
        };

        //设置不公平分发
        //int prefetchCount = 1;
        //设置与取值
        int prefetchCount = 5;
        channel.basicQos(prefetchCount);

        //采用手动应答
        boolean autoAck = false;
        channel.basicConsume(ACK_QUEUE_NAME, autoAck, deliverCallback, (consumerTag) -> {
            System.out.println(consumerTag+"消费者取消消费接口回调逻辑");
        });
    }
}
